As you are in the process to shorten the boot labels (at least on the "combo.iso") may I suggest to extend this "feature" also to the 'isolinux.cfg' files of the exiting images (i.e. 'tinycore' -> 'tc', 'microcore' -> 'mc').

As I use the ISO files a lot to boot VMs I'll have to enter always the full name when using boot codes and these nice two-character labels would be greatly appreciated.